David Cameron is to take the unprecedented step of joining senior Labour politicians to campaign against the alternative vote, in the clearest sign yet that the No camp fears it could be defeated in next month's referendum.

The "no" campaign for the voting system referendum next year suffered embarrassment today when it was first forced to remove a Cabinet Minister from its list of supporters and then wrongly claimed he was opposed to the switch to the Alternative Vote.

Opponents of electoral reform suffered embarrassment last night after wrongly claiming that a senior Cabinet minister would play a prominent role in the drive for a "no" vote in next year's referendum.

Last year, the Tricycle Theatre scored a notable hit with The Great Game, a cycle of short plays about Afghanistan. Women, Power and Politics follows the same model, exploring the titular subject from many angles through nine specially commissioned short plays, written exclusively by female dramatists and interspersed with verbatim vignettes derived from interviews with contemporary politicians.